%{
#include<stdio.h>
#include<string.h>
int s = 0;
%}
%%
([a-zA-Z0-9])* {s++;}
"\n" {printf("%d\n", s); s = 0;}
%%
int yywrap(void){}
int main()
{
yylex();
return 0;
}
OUTPUT
sunny@sunny-PC:~/Desktop$ flex nw.l
sunny@sunny-PC:~/Desktop$ gcc lex.yy.c
sunny@sunny-PC:~/Desktop$ ./a.out
Computer Science
2
